Frenzied, out of control (7)
I believe the answer is:
berserk
This clue is a double definition.
'frenzied' is the first definition.
(I've seen this in another clue)
'out of control' is the second definition.
(I've seen this before)
(Other definitions for berserk that I've seen before include "Mad" , "nuts" , "Crazy" , "Wild, frenzied" , "Frenzied, maniacal" .)